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Kinetics of Nonradiative Energy Transfer between Close-Packed InP/ZnS Nanocrystals

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Abstract

After pulsed excitation of close-packed colloidal quantum dots, the resulting excitons begin to migrate over individual nanoparticles due to the effect of Förster nonradiative energy transfer. Due to inhomogeneous broadening, this leads to a dependence of the peak position of the time-resolved fluorescence spectrum on time. In this work, a formula for the initial rate of this process has been derived. Furthermore, an estimate of the characteristic relaxation time for the hypothetical equilibrium Boltzmann distribution of excitons over the particles of the ensemble has been obtained. For typical inhomogeneous broadenings, this time was found to be so long that, in fact, equilibrium cannot be reached. The theoretical results obtained have been tested on colloidal nanoclusters and thin films of InP/ZnS nanoparticles.

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Funding

This work was supported by the Russian Science Foundation, project no. 21-73-20245.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    D. K. Yuldasheva, D. N. Pevtsov, A. V. Gadomska & S. A. Tovstun

  2. Faculty of Basic Physicochemical Engineering, Moscow State University, 119991, Moscow, Russia

    D. K. Yuldasheva

  3. Moscow Institute of Physics and Technology (National Research University, 141701, Dolgoprudnyi, Moscow oblast, Russia

    D. N. Pevtsov, A. V. Gadomska & S. A. Tovstun

Authors
  1. D. K. Yuldasheva
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  2. D. N. Pevtsov
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  3. A. V. Gadomska
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  4. S. A. Tovstun
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Contributions

D.N. Pevtsov: synthesis, washing, and primary characterization of nanoparticles. D.K. Yuldasheva and A.V. Gadomska: preparation of nanoclusters and films from nanoparticles, measurement of their optical properties. S.A. Tovstun: theory.

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Correspondence to S. A. Tovstun.

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The authors declare that they have no conflicts of interest.

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Translated by A. Tatikolov

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Yuldasheva, D.K., Pevtsov, D.N., Gadomska, A.V. et al. Kinetics of Nonradiative Energy Transfer between Close-Packed InP/ZnS Nanocrystals. High Energy Chem 56, 399–410 (2022). https://doi.org/10.1134/S0018143922060182

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  • DOI: https://doi.org/10.1134/S0018143922060182

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